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High-solids, low-viscosity alkyd-modified polyester resin for efficient formulation and reduced VOC content.
Excellent compatibility with melamine formaldehyde crosslinkers, enabling robust cure performance at standard baking temperatures.
Superior gloss retention and color stability in outdoor-exposed coatings.
Good flexibility and impact resistance, supporting durable finishes on metal substrates.
Consistent batch-to-batch reproducibility, ensuring reliable manufacturing scale-up.
Industrial coil coatings for pre-painted metal (PPM) used in building panels and appliances.
Automotive OEM and refinish topcoats requiring high-gloss, weather-resistant finishes.
General-purpose metal packaging coatings, including food and beverage cans.
Architectural metal cladding and facade systems exposed to UV and moisture.
| Chemical Type | Alkyd-modified saturated polyester resin |
| Product Form | Liquid |
| Appearance | Clear, pale yellow to amber viscous liquid |
| Solvent Content | Proprietary aromatic hydrocarbon blend |
| Non-Volatile Content (NV) | Approx. 60–65 wt% (as supplied) |
| Acid Value | 5–10 mg KOH/g |
| Hydroxyl Value | 45–55 mg KOH/g |
| Viscosity (25°C) | 3,000–5,000 mPa·s (Brookfield, spindle #4, 20 rpm) |
Q1: What is the primary function of SETAPOLL SP302 in polyester-based coating systems?
A: SETAPOLL SP302 is a specialty reactive diluent and viscosity modifier designed to reduce formulation viscosity without sacrificing reactivity or final film performance. It functions as a low-VOC, styrene-free alternative that participates in the free-radical curing process, contributing to crosslink density and enhancing hardness development.
Q2: Is SETAPOLL SP302 compatible with standard unsaturated polyester resins and common initiators?
A: Yes, SETAPOLL SP302 demonstrates broad compatibility with conventional unsaturated polyester resins, vinyl esters, and acrylic-based systems. It is fully compatible with commonly used peroxide initiators such as MEKP and BPO, and does not require special handling or pre-mixing protocols under standard formulation conditions.
Q3: How does SETAPOLL SP302 impact pot life and cure speed compared to traditional styrene?
A: SETAPOLL SP302 typically offers a slightly extended working time (pot life) relative to styrene at equivalent loading levels, while maintaining efficient through-cure under standard thermal or UV-assisted conditions. Its reactivity profile supports good gel time control and consistent network formation across varied ambient and processing temperatures.
Q4: Can SETAPOLL SP302 be used in food-contact or industrial maintenance coatings?
A: SETAPOLL SP302 is formulated for use in industrial and protective coating applications where regulatory compliance depends on full system evaluation. While it contains no intentionally added heavy metals or restricted phthalates, end-use suitability for food-contact applications requires full formulation testing and validation against applicable regional regulations.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
